Collapsible core.



A. ADAMSON.

GOLLAPSIBLE CORE. APPLICATION FILED 151120, 1911.

1,007,626, I Patented 061. 31, 1911.

ALEXANDER ADAMSO N, F AKRON, OHIO.

COLLAPSIBLE CORE.

Specification of Letters Patent.

Patented oct. 31, 1911.

- Application filed February 20, 1911. Serial No. 609,693.

To all whom it may concern. 1

Be it known that I, ALEXANDER AnAMsoN,

a citizen of the United States, residing at.

Akron, in the county of Summit and State of Ohio, have invented new and useful Improvements in Collapsible Cores, of which the following is a specification.

This invention relates to improvements in collapsible cores for mamifacturing theouter-shoes of doubletube pneu i'natic-tires, and the object thereof is to provide a collapsible-core which may be quickly assembled or collapsed, the invention contemplating the provision of a plurality of segmentshaped members, which, when united, will form an annular core-body for imparting to the interior of a tire-shoe during the manufacture thereof. the proper shape to receive the inner inflatable tube, the invention more particularly residing in the means whereby theyarious segment-shaped mem bers constituting the body-portion 0f the core are temporarily united.

\Vith the foregoing and other objects .in VlOW, the invention consists in the novel construction, combination and arrangementof parts constituting the invention to be hereinafter specifically described and illustrated in th accompanying drawings which form a part hereof wherein is shown the preferred embodiment of the invention, but it is to be understood that changes, variations and modifications can be resorted to which come within the scope of the claims herminto appended.

In the drawings in which similar rcfei ence numerals indicate like parts in the (lit? l'erent. figures, Figure 1, is -a plan of a ring core embodying this invention; Fig. 3, is a longitudinal, central sectional view of two scgmeut-shaped members forming a portion of an annular core body, illustrating the means by which the abutting ends of the two members are detachably uuiteth Fig. 3, is a sectional View on line X, of Fig. 1; Fig. -.t, is a side elevation of the-outer face or tre:.-.dforming surface of a portion of core embodving this invention: and, high, is a detail of a portion of the mechanism used for detachably uniting the segmentshaped members together.

The ring-core is constructed of a pinrality of segment-shaped members, which, u hcn united together by means to be hereinatter described, constitute an annulus, the outer portion of which is'shaped to=imnart the desired configuration to the inner wall of a tireshoe manufactured thereon. These segmei'it-shaped members are designated in the drawings by the reference numerals 1, 2, 3, and at, and are designed to be assembled with their ends arranged in abutting relation to form, when so assembled, a complete annulus, and each segment is preferably provided with an inwardly-extending flange- '0. The means for uniting 'the various seg ments together are all similar and hence a description of one is deemedto be sutlicient. It will be assumed that the description which follows refers to the uniting of segments 3 and 4;.

In order to secure perfect: registration between contiguous segments the abutting ends of the outer or tr ad-forming portions of the segment-shaped. members are provided with alined recesses to receive a key (3 which is preferably secured to one member by some means such as a pin 7, so that as the segment 4. is withdrawn inwardly the key (3 otters no obstacle. to its movement. The key (3 secures perfect registration between the outer tread-forn'iing portions of the segments and prevents lateral displacement of one member with respect to the remaining members, and in order to prevent radial displacement of one member with respect, to its contiguous member, dowel pins 8 are inserted in openings neferably extending transversely through the flanges of contiguous members at the joint between them.

The locking means for uniting each pair of contiguous segment-shaped members together to form an annular core-body comprises a bolt S) shiftably mounted in a pair of alined recesses 10 and 1]. formed in the abutting portions of contiguous segments. These recesses 10 and 11 are interiorlyshaped to receive the bolt 5) and are of sutlicient length to permit the same to be shifted to lock or release coadjacent segments, that is to say, the recess in the segment which arries the bolt is of sut'lieicnt length to per mit'. the bolt to be withdrawn from the recess 11 in the coadjaeent segment and the recess, in the segment 4, is. for instance, of sntli cient length to receive the projecting end; of the bolt 9 when the latter is forced out f wardly from the recess 10. The bolt 9 C()l11- prises a main portion 12 preferably eylin- 110 drical, from which extends a reduced portion or shank 13, having along one face i positioned with respect to the conical recess mits the rotation of the shaft 15 for Withand means engaging said bolt for looking thereof a series of gear-teeth 14C. Mounted in a threaded opening communicating atf right angles with the recess 10 is a threaded i shaft 15 the outer end 16 of which is preferably squared to receive a wrench for rotating the shaft and with its opposite end 17 provided with gear-teeth to mesh with the teeth 14 on the bolt 9, so that by rotating the shaft 15 the bolt 9 is shifted inwardly or outwardly as the case may be. The main portion 12 of the bolt 9 is provided on opposite sides with a pair of conical recesses 18 arranged to receive the conical heads of a pair of setscrews 19 which engage therein.

The set-screws 19 are preferably provided with heads to receive a wrench by which they may berotated, and these bolts are so 18 that the heads of said set screws engage opposite walls of the recesses 18 to provide a Wedging action tending to draw the abutting ends of contiguous segments into snug engagement with each other. By providing recesses 18 on opposite sides of the bolt 9 the latter, may, if one set of recesses become worn, be reversed and the opposite set of recesses used, this being accomplished by unscrewing the shaft 15 sufficiently to permit a partial rotation of the bolt 9.

In practice, the various segments are assembled by first alining them by means of the keys 6 after which they are locked together by means of the bolts 9 after which the dowel pins '8 are inserted and a tire-shoe is built on the core-body. The vulcanized tire and corebody embodying this invention are then placed in a suitable mold to be vulcanized, after which, the molds are separated and the cured tire and core removed therefrom. The operator then drives out the dowel-pins 8 and unscrews the set-screws 19 which erdrawing the bolt!) from the member containing the recess 11 which is then drawn inwardly through the opening in the inner por tion of the tire-shoe. In practice, it is customary to first withdraw the segment 1 the shape of which resembles an inverted keystone after which members 2, 1, and 3 are removed in the order named.

I claim:

1. A device of the class described comprising a plurality of segment-shaped members disconnected from and adapted to abut end- Wise against each other to form a collapsible ring-core, the abutting ends of contiguous members provided with registering recesses, a bolt carried in the recess in one member and adapted to be projected into the recess in the complementary member for temporarilyho'lding said segment-shaped members the latter against movement and simultaneously drowing the opposing ends of coadjacent members toward each other.

2. A device of the class described comprising a plurality of segment-shaped members disconnected from and adapted to abut endwise against each other to form a collapsible ring-core, the abutting ends of contiguous members provided With registering recesses, a bolt carried in the recess in one 3. A device of the class described comprising a plurality of segment-shaped members disconnected from and adapted to abut end- Wise against each other to form a collapsible ring-core, the abuttingends of contiguous segments being formed with registering recesses, a shiftable bolt in said recesses, means for shifting said bolt while in the recess in one member to cause it to project in the complementary recess, said bolt provided with gear-teeth and a shaft having a portion provided with gear-teeth intermeshing with the teeth on said bolt for longitudinally shifting the latter.

4. A device of the class ing a pluralit of segment-she ed members disconnected rom and adap te to abut end- Wise against each other to form ring-core, the abuttin ends of contiguous members provided wit registering recesses, a bolt carried by the recess in one member adapted to be projected into the recess in the complementary member for holding said segment-shaped members in annular formation, and means for locking said bolt against movement.

5. A device of the class described comprising a plurality of segment-shaped members disconnected from and adapted to abut endwise against each other to form a collapsible ring-core, the abutting ends of said members provided with registering recesses, a bolt in described comprisa collapsible the recess of one of said members arranged to be projected into the recess in the complementary member for temporarily holding said segment shaped members in annular formation, means engaging said bolt for shifting it, and a pair of members engaging said bolt for locking said bolt against movement and holding said segment-shaped members snugly together.

6. A device of the class described comprising a plurality of segment-shaped members disconnected from and adapted to abut endwise against each other to form a collapsible ring-core, the abutting ends of said segmentshaped members provided 'with registering recesses, a bolt mounted in the recess in one member and arranged to be shifted to enter and interlock in the recess'in the complc- -a bolt mounted in the recess in one member mentary member, said bolt provided with a recess, means for shifting said bolt longitudinally and means carried by one of .said segments andengaging the recess in said bolt for holding the sam 2 against movement. said bolt against said longitudinal shifting 20 7. A device of the. class described comprising a plurality of segment-shaped members disconnected from and adapted to abut end wise against each other to form a collapsible ring-core, the abutting ends of contiguous members provided with registering reeesses,

capable of being shifted to enter and interloek in the recess in the complementary member, said bolt provided with a pair of recesses spaced apart, means for shifting said bolt and means engaging in said last named recesses and carried by each of said seg1nentsl1aped members tending to lock and force the abutting end. of contiguous members snugly together.

In testimony whereof I have hereunto set my hand in prewuee of two subscribing \vituesses.

ALEXANDER Alb-UNISON.

'itnesses:

(l. I). lliinrinucy, A. 1,. Mt'CLIN'lUUK. 

